The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2014
Filed:
Jan. 25, 2010
Daniel I. Harris, Honeoye Falls, NY (US);
Joseph Nicholas Lovria, Honeoye Falls, NY (US);
Matthew C. Kirklin, Pittsford, NY (US);
Gary M. Robb, Honeoye Falls, NY (US);
Daniel I. Harris, Honeoye Falls, NY (US);
Joseph Nicholas Lovria, Honeoye Falls, NY (US);
Matthew C. Kirklin, Pittsford, NY (US);
Gary M. Robb, Honeoye Falls, NY (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for controlling cathode air flow at system start-up by controlling a stack by-pass valve. The method includes determining a concentration of hydrogen in a cathode side of the fuel cell stack. The method also includes determining a volumetric flow rate through a cathode compressor, determining a volumetric flow rate through the cathode side and determining a fraction of volumetric flow rate through the cathode side to the total flow through the compressor. The method determines a modeled hydrogen outlet concentration from the fuel cell stack based on the volumetric flow rate through the compressor, the fraction of volumetric flow rate through the compressor to the total flow through the compressor and the concentration of hydrogen in the cathode side. The method uses a desired fraction of volumetric flow rate through the cathode side and the total flow through the compressor to determine the position of the by-pass valve.